Pole reenforcement



Jan. 22,I 1929. 1,699,736

' D. B. HANNA POLE REENFORCEMENT Filed Sept. 8', 1924 3 Sheets-Sheet lIN VEN TOR A TTORNEY Jan. 22, 1929.

` D. B. HANNA POLE REENFORCEMENT Filed Sept. 8, 1924 5 Sheets-Sheet 2iwf/'wiss By A TTORNEY Jan. 22, 1929.

v1,699,736 D. B. HANNA POLE REENFORGEMENT Filed Sept. 8, 1924 3SheebS-Sheet 3 WIT/VES? l f A TTORNEVJ' Patented Jan. 22, 1929.

UNITED STATES N 1,699,736 PATENT erstes.

DAVID B. IIANNA, OF CHICAGO, ILLINOIS ASSIGNOR, BY

Mnsivn ASSIGNMENTS, ro

WES'I'INGI-IOUSE ELECTRIC it MANUFACTURING COMPANY, OF EAST PITTSBURGH,PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

POLE BEEN FORCEMEN T.

Application filed. September My invention relates to pole molds andreenforcement, my aim being `to facilitate and che-apen the manufactureoi' concrete poles, posts, and the like; to provide strong, reliablereent'orcement for such poles; and, to provide for the attachment ofparts4 or structures to be supportedby such poles conveniently andreliably. How these and other advantages can be realized through myinvention will appear from my description hereinafter otl selected andpreferred embodiments. v

In the drawings, Fig. l shows half of a mold suitable for the purposesof my invention, with a reenforcing system in place in it, various partsbeing in vertical midsection, and several intermediate portions brokenout and omitted. l

Fig. 2 is a plan view ot a member of them reent'orcing system shown inFig. l, illustrating its relation to the longitudinal reenforcingmembers and to the mold cavity.

Fig. 3 is an edge view ofthe device shown in Fig. 2, partly in sectionas indicated by the line 3-3 in Fig. 2.

Fig. d is a plan view of another member of the reentorcing system `shown`in Fig. 1,.; illustrating its relation to a corresponding portion ofthe mold.

Fig. 5 is aside elevation of a pole such as` may be produced in` themold shown in` Fig. l, an intermediate portion being broken out andomitted.

F ig. 6 is a view similar to Fig. 2, illustrating a slightlydiilerentform of reenforcing device; and Fig. 7 isa corresponding sideview.

Fig. 8 is a view `similar to Fig. 4, illustrating a slightly dilferentform of device; and Fig. 9 is a corresponding side view.

My invention is applicable to poles made in various ways, as by pouringand molding concrete, or by distributing it centrifugally 'in arevolving mold, and to both solid and hollow poles. I have hereillustrated and described it with special reference to the manufactureof solid poles by molding, without resort to centrifugal action.

.its illustrated in Fig. l, the mold l0 may preferably be made inlongitudinally divided sections, with flanges at their meeting edgesapertured as indicated at ll for bolts or other iastenings (not shown)to secure the mold sections together. `In the present in- 8, 1924.Serial'No. 736,409.

stance, themold ends or heads l2, 13 are separate,` and engage the mainportion or sections of the mold l0 at their edgesll. As shown, thecorresponding portions of the mold l() not only atl'ord endwise abutmentfor the heads l2, 13, but also hoolrover the edges at let to secure themin place. Pret'- erably, the edges 14 and their seats l5 in the moldsections may `be beveled, as illustrated. The seats l5 may convenientlyhave the form of grooves` eX- tending all the way around the ends of themain mold portion 10. Y

Thel reenforcing system shown in Fig.. l comprises a number oflongitudinal` members 20 in the .trom of round metal rods,and also agreater or less number of devices` or structures 2l, 22, according tothe` length, etc., of the mold l0 and of the polevto be produced. Therods 20 may preferably extend through or be embraced by the portions 23,24, ofthe structures 2l, 22 by whichA they are secured to the latter. Inthe presentinstanoe, these devices 21,22 serve both to space the rods2O` apart with reference to one another' and to position them properlyin the .mold cavityuntil the concrete has set.` Besides being thuspositioned transversely in the mold cavity, the rods 20 are preterablysecured and held in position lengthwise. As here shown, the upper endsof the rods 2O are headed or swaged over beyond the device 22 aftertheir insertion through it, and the device 22 is secured against theinner side of the head l2 bybolts 25 extending through holes in thelatter. At their lower ends, the rods 2O extend heXagon-ended screwthreaded nipples 26 and are headed over beyond them, are secured to thehead 13 by headed shouldered through holes in said hexagon-` screws 27extending head 13 and engaging aid nipples 26. By tightening up` on thescrews 27, `the rods 2() may be individually drawn and held taut betweenthe ends ofthe mold. i As shown in Figs. l, 2, 3 the intermediatedevices 2l are in the nature of spiders, with prongs 3l projecting fromannular hollow frame portions 32, and pointed to a 90 degree angle orless at their ends for the purpose of engaging accurately in thecornersof the mold cavity. The rod securing portions 23 of-these members 2lhave the form of semicorrespondingly t through and they `be sli pe keptin circular notches with lugs 33 at either side. Initially, the notches33 are open outward, as shown in Fig. 2, so that the rods 2() may beinsertedin them Vsidewise; but after the rods are in place, the lugs 33are bent together around the rods 20, as shown in Fig. 1, so as to holdthe rods securely, or even grip them tightly.

The upper devices of spiders. their securing means 24 for the rods 20are preferably formed initially round. eyelets, so as to hold the headedends oi' the rods securely. In the present instance, the prongs 34 onthe annular frames 32 ot' the spiders 22 are not long enough to engagethe inner surface of the mold 10, but simply serve as reeni'orcement forthe upper end of the pole,here shown as enlarged or headed,`-and arecurved upward somewhat (see Fig. 1) for this purpose. This vspider 22also has lateral prongs 35 with feet or lugs' 36 apertured to take thebolts 25.

In practice, one or more mold sections 10 comprising about half of theperimeter the mold cavity may be arranged horizontally 22 are also inthe nature the heads 12, 13 properly engaged with the sections, as shownin Fig. 1. The spider 22 having been bolted to the upper head 12, thecorres onding ends of the rods 2O may through the holes at 24 and headeover,-or if preferred, the rods may be headed in advance and slippedthrough the holesof the spider 22 beore the latter is secured in place.Intermediate spiders 21 2() and turned edge-wise into the position shownin Fig. 1; and the'rods are manipulated and slipped into their opennotches at 33, being sufficiently flexible ttor this purpose. Then thenipples 26 are slipped over the lower ends of the rods 20 and thelatterheaded over at 28 (unless this has been done in advance, prior to theinsertion of the rods inthe mold), and the screws 27 are insertedthrough the holes in the head 13 and screwed on the nipples 26 until therods are drawn properly taut. After this, the remaining section orsections of the mold (not shown) may be put in placev and secured, andthe concrete poured through opening 40 in cup 12 `or inany usual manner.Owing to the engagement of the prongs31 in the .corners ofthe moldcavity, as indicated in Fig. 2, the rods20 are not only spaced apart andproper positions relative to one another, but are also accuratelyTpositioned in the mold cavity throughout their length. When the concreteis set sufficiently, the bolts 25 and the screws 27 are withdrawn, thusreleasing the pole ends from the mold heads 12, 13. Thereupon the mainmold sections 10 are taken apart and the entire pole thus released. Aswill be seen from Fig.

As shown in Figs. 1 and 2,`

(or in any other convenient position), with are then slipped fiat-wisebetween the rods 5, the nuts 37 of the bolts 25 remain in place in theupper end or head of the pole beyond the feet 36 of the lateral prong 35oi' thc spider 22, so as to afford screw-threaded engagement (in casethe prong feet 36 have not been tap ed) Jfor similar bolts that may bcemploye to secure a lighting iixture or other structure to the top ofthe pole. Likew wise, the screw-threaded nipples 26 on the rods 2Oremain embedded in the concrete ai' the lower end of the pole, withtheir tlireadu ed portions exposed in recesses 38 in the concrete, andare available for securin the butt end ot the pole, if this should bedesired. Both the various spider arms or prongs 31, 34, 35-and thenipples 26, it willl be seen, serve to anchor the reinforcementsecurelyf in the concrete of the molded pole, and also helpto strengthenand reenforce the latter.

In Figs. 6 and 7 is illustrated a somewhat lighter form of intermediatespider 21, in which the rod-engaging portions 23 are not notched, as inFigs. 1, 2, 3, but simply bored to an appropriate size to take the rods20,A like the corresponding portions of the spider 22 in Fig. 4. Asshown in Fig. 7, these rodengaging portions 23 are of substantial widthin the direction of the length of the rods 20, so as to obviate anytendency for the spider 21 to get askew and jam on the rods. In Figs. 8and 9 is shown a similarly lighter form of spider 22 for the head of thepole. These are suitable for very short` poles,-though even for shortpoles the forms shown in Figs. 1, 2 and 3 are more convenient.

If desired, the apertures of the spiders 21, 22 of both forms (Figs. 2,3, 4 and 6, 7, 8, 9) may be made of appropriately graded sizes, so thatthese spiders 21, 221nay be strung or mounted on a suitable taperedmandrel (of wood or of metal-#not shown) and thereby automaticallyspaced, and the rods 20'put in place and secured to the spiders 21, 22before any of the parts are inserted in the mold 10. In this case, themold end 13 will be left of until the mandrel has been withdrawn; thenit will be put in place and the screws 26 inserted and used to tightenup the rods 20 as before.

I claim:

1. A reenforcing system for a pole, comprising longitudinal rods and aspider secured to their ends having prongs for reenforcing thecorresponding pole end and secluring a structure to be supported by theP0 e:

2. A reenforcing system for a pole, comprising longitudinal rods and aspacing structure secured to their ends and afford ing screw threadedmeans of attachment for securing a structure to be supported by thepoles comprising an upper spider having lll means for engaging aplurality of reen- 'oreing rods, a plurality of lateral supportingprongs engaging said spider, said lateral supporting prongs havingopenings at their upper ends to provide means for engaging lightingunits and the like When the pole is completed.

4. A reenforoing structure for concrete poles comprising an upper spiderhaving means for engaging a plurality of reeni'orcing rods, a pluralityof lateral supporting prongs engaging said spider, said spider having aplurality of supporting prongs, said lateral supporting prongs havingopenings at their upper ends to provide means for engaging lighting whenthe pole is completed.

5. A reeni-oroing structure for concrete poles comprising an upperspider having` means for engaging a plurality of reenforcing rods, aplurality of lateral supporting prongs engaging said spider, saidlateral units and the like supporting prongs having openings at theirupper ends to provide means for engaging lighting units and Vthe likeWhen the ole is completed and a plurality of reen 'orcing spildersdistributed along said reenforcing rot` s.

6. A reenforeing structure for concrete poles comprising an upper spiderhaving means for engaging a plurality oi' reenforoing rods, a pluralityof lateral supporting prongs engaging said spider, said lateralsupporting prongs having openings at their upper ends to provide meansfor engaging lighting units and the like when the pole is completed, aplurality of reenforoing spiders distributed along said reenforcing rodsand means at the lower end of said rods for engaging a foundationanchorage when the iinished pole is set up.

In testimony whereof, I have hereunto signed my name.

DAVID B. HANN

